Winding key for cameras



Oct, 7

C. A. BORNMANN, JR

WINDING KEY FOR CAMERAS Filed April 5 1924 INVENTOR the same.

Patented oct. '7, 1924; I

- UNITED STATES PATENT OFFICE.-

cm A. BORNMANN, J13, OF BINGHAMTON, NEW YORK, ASSIGNOR '10 ANSCO PHOTO- PRODUCTS, INC., OF IBINGHAMTON, NEW YORK.

WINDING KEY Application filed April 5,

To all whom it may concern:

Be it known that I, CARI. A. BORNMANN, Jr., a citizen of the United States, and a resident of the cityof Binghamton, county of Broome, and State of New York, have invented a new and useful Improvement in a Winding Key for Cameras, of which the following is a description, reference being had to the accompanying drawing, which forms a part of this application.

' My invention relates to cameras andpar-- ticularly to a novel typeof winding key for The principal object of m .invention is to 1 ,provide such a key of the ock type which is positive in operation, sim le in construction and of few parts, ren ermg the same inziiipensive to manufacture.

re specifically it is my ob ect to utilize a spring coil of a character which'will permit ready turning of the key stem in one direction but which effectually locks the same against rotation in the opposite direction. y Other objects and advantages iii-details of construction and operation will be apparent as the description proceeds,reference eing' had to the accompanying drawing where like reference numerals indicate like parts. v

. In the drawing Figure 1 is afront view of the top por tion of a camera showing my improve winding key in position and ready for operation.

Fi re 2 is an exploded view showing clearfy: in perspective the variousparts or elements which go to make up the key.

Figure 3 is a detailedperspective view of the key'lhoiising showing clearly the position and operation of the" lock spring therein.

Fi f re 4' is-"a perspective view of the assemb ed key. y a

Reference numeral L indicates a camera of conventionaltype," in this case a folding camera to which my improved key may be applied. It will be understood, however, at this key is equally adaptable for use'on cameras of the box type as well. Number 2 indicates the usual carryiniglhlxilandle on the camera and 3 refers to .a spool supported in the camera by the pin journal 4 and the key web 5. These parts are all of non. oamnnns.

1924. Serial No. 704,522.

conventional design and require no detailed r which is circular in form and is slotted as 4 at 7 thru a portion of its length. An opening 8 near one end thereof accommodates the finger piece 9 by means of which the stem may be rotated. Thestem 6 passes thru an opening 10 in the top of the housing 11 which is circular in form and is provided with prongs 12 by means of which the key is fastened to the cameral. This method of securing the key is clearly shown in dotted lines in Fig. 1 Where the prongs 12 are illustrated as being driven thru the side wall of the camera and turned outwardly as at 13.

Fitting within thehousing 11 is a tightly coiled spring 14 the inner end of which is straightened at right angles across the opening formed by the coils, as at 15. This end 15 of the spring engages in the slot 7 ofthe stem as clearly shown in Fig.

3 and permits the stem to be readily pulled outwardly for disengaging the web 5 from the usual slot in the end of the spool 3, or pushed in for the purpose of engaging the same- The cover plate 16 provided with a small opening 17, permitting passage of the stem 6, and oppositelydis osed slots .18 permitting the passage of t e rongs 12, fits over the housing 11 thus hol ing spring in place within said housing. From the foregoin description it will be readily understood t at. with the parts in assembled position the stem 6 upon being turned in one direction (to the'left in 3 freely rotates, turning the coil spring 14 with it due to the engagement of the end '15 of the spring in theslot 7 of the stem. The stem is permitted to turn freely in this direction because no strain is placed upon the coil 14, it simply turnin housing 11. Turning of t e stem in the opidly within the posite ditection is prevented, however, by I the action of the slotted ortion 7 tending to unwind the coil 14 there y causing the same to bind tightly against the inner wall of the housing 11. r

It will be obvious from this description that I have devised a winding key for cameras which consists of fewdparts, is simple and easy of operation an assembl and -which is decidedly practical and e ective for the purpose described. Of course my invention is susceptible to. many variations in design and construction without departing from the scope and spirit thereof. I do not engages within said slot, and a cover plate 5 limit myself therefore to the exact form apertured to accommodate the securing shgwn other than by the appended claim. prongs and the stem.

claim:

A winding key for cameras comprising a v CARL BORNMANN, JR.

housing, securing prongs integral therewith a slotted stem extending thru said housing,,' a coil spring therein the innerend of which 

